hamilton



Fel m 3, 1931. LT 1,790,916

PRESS BOARD I Filed Aug.- 1, 1928 Patented Feb. 3, 1931 UNlTED STATES f' 1 EDWARD r. HAMILTON, or Two RIVERS, W scons n, ,Ass cnonro HAMILTON ann- FACTURING COMPANY, on TWO arvnns, sconsin, nicon'ronnrronorwxsco sm PRESS 310.43

Application filed August 1, 19 28. SQriaLNO, 2526,85 2.

My invention relates to boards which are bound by strip material such as brass, the invention being of particular service inthe formation of press boards used in book binding,

though the invention is not to be thus restricted.

In accordance with one characteristic of the invention, the board, preferably though not necessarily of wood, is grooved between 10 its broad faces and the binding for the board has a rib formation entering said groove. The binding preferably completely circumscribes the board which is also preferably the case with the rib formation and groove.

In accordance with another characteristic of the invention, interlocking formations are provided upon the contiguous ends of the binding for the board to hold these ends at the 7 same level with respect to each other and cial importance where the board binding is wider than the thickness of the board and pro-.

jects beyond both of its broad faces. The binding of a board applied in accordance with r my invention is well guarded from disarrangement both with respect to the compo-' nent parts of the binding and with respect to the board.

The invention will be more fully explained in connect-ion with the accompanying drawing in which Fig. 1 is a perspective view of a press board bound in accordance with the preferred embodiment of the invention; Fig. 2 is a perspective view illustrating a broken away portion of the structure with parts thereof in separated relation; and Fig. 3 is a side view with parts broken away.

The board 1 is preferably but not necessarily of wood. It is grooved upon its edges and midway between its broad faces as indicated at 2, the groove formation preferably completely circum'scribing the board. This groove'is preferably angular in cross section with the sides thereof perpendicular to the bottom thereof that is preferably flat. Four strips 3, 4, 5 and 6 of brass or other suitable material are applied to the edges of the board,

these strips being wider than the thickness of the board and projecting beyond both broad faces thereof when the structure is embodied with respect to the board, a feature of espein ,a press board for ibookbindi-ng .or I other likeggpurpose. Said strips-project to'eq'ual extents beyond zboth broad faces of the board to constitute .fianges {for producing the hinge formingcreases in the backs of the booksbetween which the board is suitably clamped. The bindingis positioned by means of. the inner .rib formation 7 that extends along the binding and is pressed from each of the strips "3,4, 5 and fi and which "corresponds inshape to the shape of the groove to ;be':.snugly received inv the groove. In making the. rib for- ,mationan external channel 8 is 'fOlE Iled in register therewith. This channel 8 maylserve to. receive, preferably fullygptheheadsof assembling screws 9,if suchibe employed to fasten the binding in place. "Hitherto-the stripsfi, 4,5, :6 were apt t0;b e shifted lateral-lygofjtheiboard so as to extendunequal distances beyond the board which would cause some of the creases in thewbook backs tobe provided with a tongue 10 at each end thereof and each of the strips 4: and 6 is provided w th a not h 1 a each e t er h tongue beingsnuglyreceived ina contiguous notch to prevent lateral movement of the ad jacent ends of adjacent strips for the purpose which has been stated. Each tongue 10 is desirably Wider than the rib 7 and extends upon both sides of the rib which is thus formed, in part, of the tongue.

I have illustrated four separately formed strips upon the edges of the board but, obvi ously, the invention need not be thus limited nor need it be limited to the rectangular shape of the board.-

Changes may be made without departing from the invention.

beyond the broad faces 0 Having thus described my invention, I claim:

1. A board having a groove in its edge portion and between its broad faces, in combination with a binding of strip material projecting to equal extents beyond such broad faces and formed with an inner rib snugly received in said groove.

2. The structure of claim 1 wherein an ex- I ternal channel is formed in the binding and V in register with the rib and fastening screws are passed through the rib into the'board and having heads which are received in the channel. Y

3. The structure of claim 1 wherein adjacent end portions of the strip material constituting the binding'have interlocking formations serving to prevent shifting of such end portions laterally of the binding.

4. The structure'of claim 1 wherein adjacent end portions of the strip material constituting the binding are respectively formed with a tongue and a notch snugly receiving the tongue to prevent shifting of the end portions laterally of the binding.

5. The-structure of claim 1 wherein an ex- Y 'ternal channel is formed in the binding and in register with the rib and fastening screws are passed through the rib into the board and having heads which are received in the channel and wherein adjacent end portions of the strip material constituting the binding have interlocking formations serving to prevent shifting of such end portions laterally of the binding.

6. The structure of claim 1 wherein an external channel is formed-in the binding and in register with the rib and fastening screws are passed through the rib into theboard and having heads which'are received in the channel, and wherein adjacent end portions of the strip material constituting the binding are respectively formed with a tongue and a notch snugly receiving the tongue to prevent shifting of the end portions laterally of the binding.

7. A board in combination with a binding of strip material projecting to equal extents the board, said board and binding having snugly interfitting rib and groove formations extending along the board and between its broad faces.

In witness whereof, I hereunto subscribe my name.

EDWARD P. HAMILTON. 

